
Off-hook
The telephone is in an off-hook state when the handset is removed from the cradle. A modem or
other device is off-hook when it answers a call or when it seizes a line to initiate a call.
Public Switched Telephone Network (PSTN)
Refers to the worldwide voice telephone network accessible to those with telephones and access
privileges (It was formerly called the Bell System network or the AT&T long distance network.)
Reorder Tone
A tone that sounds like the busy signal, but is twice as fast. It indicates that all switching paths
are busy. If you hear a reorder or fast busy, hang up and dial the number again.
SAS
Subscriber Alerting Signal - BellCore term for Call Waiting Tone
SCWID
Spontaneous Call Waiting with ID(Caller ID) - NorTel term - same as CIDCW
Appendix A: Glossary
40-400-00003, Rev.
E
Page 65